Samuel d



(No Model.)

\ S. D. WEBB. I

" LOOKING UP DEVICE FOR TYPE POEMS.

Patnted June 6, 1882.

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UNITED STATES.

PATENT OFFICE.

SAMUEL D. WEBB, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OFONE-HALF TO HECTOR MGNEILL, OF SAME PLACE.

LOCKING-UP DEVICE FOR TYPE-FORMS.

SPECIFICATION forming part of Letters IPatent No..259,251, dated June 6,1882.

Application filed February 16, 1882. (No model.)

To all whom it may concern:

1 Be it known that I, SAMUEL D. WEBB, of Washington, in the District ofColumbia, have invented a new and useful Improvement in Locking-UpDevices for Type-Forms, of which the following is a full, clear, andexact descrip-v tion, reference being had to the annexed drawings,forming part of this specification.

My invention relates to devices for locking a type-form in a printerschase; and it consists of a number of removable quoins having extensibleand reversible parts, as hereinafter described.

In the accompanying drawings, Figure l is a plan view of a printerschase, showing the application of my improved quoins. Fig. 2 is aperspective view of one of the quoins; and Fig. 3 is a section of one ofthe quoi'ns, showing one of the blocks reversed.

The quoin A is formed of two blocks, a a, of suitable material, whichare provided with screw-threaded perforations and screwed on the ends ofa screw, b, having a tap, c, at the center. By applying a wrench orother suitable device to the tap, as shown in Fig. 1, the screw, whichhas a right and left hand thread, will be rotated, while the blocks willbe moved to and from each other to lock or unlock the form B in thechase G.

As it is designed that four quoins shall be used to lock the form, theblocks a a are each provided with bearing-surfaces of different lengths,and are adapted to be reversed on the screw, so that a longer or shorterbearing-surface shall be presented to the form, as the case may require.With this construction a very small form may be securely locked in thechase by turning the shortest bearing-surfaces of theblocks toward thecenter of the chase; and by using strips of metal to increase thebearingsurface as large a form as the chase will con tain may be lockedtherein, while. intermediate sizes can be accommodated by simplyreversing the blocks.

I am aware thata quoin consisting of a sin- 5 gle block and a screwhaving'a head on one end thereof has been used; but a quoin of thisconstruction is not adapted for locking forms of various sizes, becauseit has but one bearing-surfac e, and, besides, the rotation of the 0head against the chase in adjusting the length of the quoin is liable tocause the quoin to slip out of position.

I am also aware that looking devices consisting of two parallel barsconnected by two 5 orimore screws have been patented but, owing to thedifliculty of adjusting the several screws with perfect evenness, thepressure exerted by one screw is liable to be greater than that exertedby another in the same bar, and conse- 6o quently the parts, whenpressure is applied, are liable to be jammed. In my invention, on thecontrary, a single screw is used, which is placed at the centers of thetwo blocks, and consequently the blocks cannot but be evenly 6 5adjusted throughout their entire length when the screw is turned. v

It is evident that my improved quoin may be constructed partly of woodand partly of 'me'tal to lessen the expense of construction, '70

and the formation of the blocks may be variously modified to increasethe number and variety of bearing-surfaces.

Having. thus described my invention, what I claim, and desire to secureby Letters Patent, 75 1s-- The combination, with the adjusting-screw ina quoin, of two blocks having two bearing surfaces each, all of whichbearing-surfaces vare of different lengths, and made reversible So toadapt the quoin to type-forms of difl'erent sizes, as shown anddescribed.

SAMUEL D. WEBB.

Witnesses:

A. G. LYNE, SOLON O. KEMoN.

